What does the fortune teller mean by triple comparison?

A double agent is different. Now ordinary spies only serve one country. On the other hand, the same is true of country B. For example, spies from country A spy on information from country B .. It is generally called a double-faced spy internationally, and the third-tier spy is also called a double-faced spy. He either thinks that country A is spying on country B, or thinks that country A is spying on information for country B..